Yes, you can use an ergonomic chair both for gaming and work. Indeed, it may be a better all-in-one option over a customary gaming chair. Especially if you want to support your posture, as well as to use it for many things, it is helpful long-term.
Your body goes through the same stress from sitting through meetings or marathon gaming sessions: long hours in a fixed position, pressure on your spine, and mental fatigue. For any focused task at hand, an ergonomic chair helps to reduce those problems.
Ergonomic chairs are built for long sessions of any kind

If you’re sitting for hours, your chair should support your back, neck, and shoulders because you are typing on a spreadsheet or holding a controller.
Gaming chairs mostly focus heavily on appearance and racing-style designs, as well as padded cushions. Support is not guaranteed by padding all alone. A seat of poor design can make your body tired as well as sore over time. This can be something that happens even if it feels comfortable at first.
An ergonomic chair allows proper posture. It is designed for sitting throughout long durations. It can be adjusted to match the height of a desk plus it should support the lower back and allow freedom of movement without any loss of alignment. That means you distract less and experience better when you focus on work tasks or immerse in gameplay.
It blends into your space better without compromising comfort

Unlike many flashy gaming chairs, ergonomic chairs can fit into personal gaming spaces and work-from-home setups with a cleaner, professional look.
Office mode requires no chair change during your day. Leisure time can be spent within the same chair. Ergonomic chairs feature breathable mesh together with adaptively support for your back let you control tilt smoothly, offering the comfort and flexibility you need all day, not just during peak focus hours.
Gaming does often include mic use and head movements, and gamers are often still for long periods of time. That is helped by an ergonomic chair because you stay alert plus upright without locking your body into a rigid position.
For work as well as play, yes, an ergonomic chair is a smart choice. It is not at all about a choice between a “work chair” and a “gaming chair” but about choosing one chair that truly supports your body no matter the activity.